if you consider only new purchase/lease drivers the above demographics will apply... however:
with many 2,7,9.series cars still on the road for everyday use,
the demographic has changed. you find young drivers who want a volvo because [a] it runs reliably [b] they hold a lot of people [c] are fairly easy on fuel
you find middle age people who know the value of a dollar, can afford most anything new but choose to keep or purchase used an older volvo [let's face it for the new price of a korean sedan you can keep a volvo running for 30 years.
the elderly like the simplicity of older volvo's and don't care for the built in obsolescence of newer models
as far as professions go high school students to senior airline pilots, housewives to generals, clergy to actor. anyone who knows that a good value never goes out of style, has at least one volvo in their stable.